Blindstitch sewing-machine.



n. 731,697. I v PATEN-TED JUNE 23, 1903:

' J. G. LEWIS.

BLINDSTITGH SEWING MACHINE.

APPLIOATION FILED NOV. 3, 1902. I N0 MODEL.

nun/ml I UNITED ST TES latented June 23, 1903.

FFICE.

ATENT BL INDSTITCH SEWING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 731,697, dated June 23,1903; Application filed November 3, 1902. Serial No. 129,835. (Nomodel.)

T at whom itmcty concern.-

. Be it known that I, JOHN G. LEWIS, a citizen of the United States,residing at the city of St. Louis, in the State of Missouri, haveinvented a certain new and useful Sewing-Machine, of which the.following is such a full, clear, and exact description as will enableany one skilled in the art to which it appertains to a make and use thesame, reference being had to the accompanying drawings, forming part ofthis specification.

My invention relates more particularly to a sewing-machine forblindstitching.

The object of my invention is to provide means for preventing the needlefrom coming through the goods at the side next the back guide, and thusexposing the stitches.

My invention consists,primarily,in the combination, with a back guide onwhich the goods are adapted to be held, of a needle coeating said needlelongitudinally, and means for causing said guide to recede laterallyfrom said needle after the point of said needlehas entered the material.

In the accompanying drawings, in which like characters of referencerefer to similar I of machine herein movable.

11isaneedle-barcarryinganeedle12,which parts in the different views,Figure 1 isa side view, partly in section and partly in elevation,showing a portion of'a sewing-machine embodying the preferred form of myinvention. Fig.2 is a top plan view of apportion of the machine, andFig. 3 is a detail View of a portion of the mechanism shown in Fig. 2.

' 1O isa back guide around which the goods are adapted to beheld andwhich in the form shown and described is is preferably held in positionin the bar by means of a set-screw 13. The needle-bar 11 reciprocateslongitudinally in bearings 14 and The shaft 16 is as to form anoverseaming-stitch; but this is not essential to my invention. Theneedlebar 11 is reciprocated longitudinally by a bar 17, secured to ashort collar 18, carried by said needle-bar. The needle 12 is preferablymountedin the center of the needle-bar 11 in the usual manner. The backguide 10 is carried by an arm .21, pivotally mounted at a point 22 to anarm 23 of the machine.

Mounted on the main shaft 24 of the ma chine, which is preferablycontained in a housing 25, is a cam 26. In this cam 26 is formed, asbest shown in Fig. 3, a groove or guideway 27, in which runs a stud orroller 28, carried on a bifurcated arm 29. The bifurcated arm 29embraces the main shaft at one end and at the other is pivoted to thearm 21, carrying the back guide 10.

In the operation of this invention the needle-bar 11 is moved upwardlyby means of the bar 17, and as the point of the needle 12 enters thegoods folded around the back guide 10 the inclined portion of theguideway-27 comes in contact with the stud or roller 28, andthus drawsthe end of the arm 21 toward the housing 25. This causes the back guide10, carried by the other end of said arm 21, to recede from the needle12, thus preventing the-enlarged portion of the needle from strikingagainst the back guide and coming through the goods or glancing.

Having fully described my invention, what I claim as new, and desire tosecure by Letters Patent of the United States, is-- 1. In asewing-machine, a guide on which the goods are adapted to be held, aneedle cooperating with said guide, means for reciprocating said needlelongitudinally, and means for causing said guide to recede laterallyfrom said needle after the point of said needle has entered thematerial.

2. In asewing-machine, a pivotally-mounted guide on which the goods areadapted to be held, a needle cooperating with said guide, means forreciprocating said needle longitudinally, and means for causing saidguide to recede laterally from saidneedle after the point of said needlehas entered the material.

3. In a sewing-machine, an arm pivotally mounted intermediate itslength, a guide on which the goods are adapted to be held carried by oneend of said arm, a needle cooperating with said guide, and meansconnected with the other end of said arm foreausing said guide to recedelaterally from said needle after the point of said needle has enteredthe goods...

In testimony whereof I have hereunto set my hand and affixed my seal inthe presence of the two subscribing witnesses.

JOHN G. LEWIS.

Witnesses:

JAMES H. BRYsoN, L. B. BEACH.

